Joint for concrete slabs



Dec. 15, 1931. B. F. FRIBERG JOINT FOR CONCRETE SLABS Filed Nov. '12, 1929 mun/roe 5. EF/E/EE/E'G BY q ag A rro/e/vav the stake with respect to the joint A, and thereafter to prevent any vertical displacement of the joint.

In setting up my improved joint preparatory to incorporating same in a roadway, the interlocking elements 10 of the respective sections of the joint are passed through the apertures 12 of adjoining sections, in the manner illustrated in Fig. 3. The stakes 13' are then passed downwardly. through the semicircular interlocking elements; that is to say, each stake will be extended between the inner face of the interlocking elementwith which it is associated,and the adjacent face of the joint section connected to the joint section on which said interlocking element is formed. The stake is'then driven into the ground, and the stakes will support the oint in its proper vertical position and will prevent separation of the joined joint elements in a direction transversely with respect to said joint sections. The lips 14 on the stakes '13jprevent the stakes from being driven too far downwardly with respecttothe joint, said lipsbeing so arranged thatthey will contact withthe top edges of the associated interlocking elements 10,.whereby such downward movement of the stakes will be arrested, and thereafter any vertical displacement of the joint prevented. I r

Each of the joint sections is provided with aninterlocking element 10 at one end thereof, and an aperture 12 at its opposite end,

and intermediate of its ends each of said j ointsections is provided with a plurality of elements which are constructed and arranged just as are the interlocking. elements 10; The latter elements, which are designated by the reference-character 15 in the drawings, are merely stake-receiving elements and serve no purpose other than-to provide' pockets through which stake's 16 are driven, hence fsaid stakes 16 serve the sole purpose ofaiding in supporting the joint in its proper vertical position, and when provided with ,the

' lips 14 said stakes prevent displacement of the joint in a vertical direction. j

In Fig-5 I illustrate another manner of looking a pair of joint sections together. In accordance with this arrangement the interlocking element 10 on one joint element is passed through the aperture 12 on an adjoiningsection, after which the joint section provided with the'aperture is moved longitudinally with respect to the joint section provided with the interlocking element so as to stake-embracing elements and are formed of material possessed of sufiicient resiliency so that when the stakes 16 and 13 are driven through the elements, said elements will be expanded slightly. In view of this arrangement the resilient elements referred to will grip the stakes and force them tightly against the adjacent faces of the joint, whereby close contact will be obtained between the stakes and the jointsections.

1. A joint for roadways comprising a plurality of joint sections, and means for securing said joint sections together to provide a'continuous jointstructure,said means comprising an interlocking. element on one of said joint sections adapted to be extended through anaperture formed in an adjoining joint section, and means comprising a stake extended through said interlocking element for preventing accidental disengagement of the joint sections and supporting the joint in an upright position prior to the' com'pletion of the roadway. f 2.. A joint for roadways comprising a plurality of joint sections, and means for securing said oint sections together toprovide a continuous joint structure, said means comprising a substantially U-shaped interlocking element on 'one of said joint sections adapted to be extended through an aperture formed in an'adjoinin'g joint section, and means comprising a stake extended through said U-shaped interlocking element for preventingaccidental disengagement of the joint sections and supporting the joint. in an upright position prior to the completion of the roadway, said U-shaped interlocking element being connected at one of its sides only to the associatedjoint section and beingformed of resilient material. whereby same is renderedyieldable soas'to grip the .stake extended therethrough. Y

3. A joint for roadways comprising a plurality ofjointsections, means for securing said joint sections together to provide a continuous joint structure, said means comprising a substantially U-s'haped interlocking element on one of said joint sectionsadapted 'to be extended through an aperture formed in an adjoining joint section, and means extended through said interlocking element for preventing accidental disengagement of the connected joint sections, the last-mentioned means comprisinga stake which aids in'supporting the joint in anupright position prior to completion of the roadway; Y Y

4.. A joint for roadways comprising aplu- 'rality of'joint sections, means for. securing said joint sections together, to provide a continuous joint" structure, said means comprisinga substantially UJ-shaped interlockingele-' ment onone ,of said. joint sections adapted to be extended'through an aperture'formed :in an adjoining joint section, andmeans extended through said interlocking element for preventing accidental disengagement of the connected joint sections, the last-mentioned means comprising a stake which aids in supporting the jointin an upri ht position prior to completion of the roa wa'y, said inter.- locking element being formed "of resilient material so as to cause same to grip the stake driven therethrough. V 10 5. A joint for roadways comprising aplurality of joint sections, and'means for secur- V ing said joint. sections together to provide a continuous joint structure, said meanscomprising a yieldable' interlocking element on i one of said joint sections: adapted to be extended through an aperture" formed in an adjoining joint section, and means comprising a stake extended through and gripped by said interlocking elementfor preventing i accidental disengagement of the joint secttions and supporting the joint in an upright 7 position prior to completion of the roadway. In testimony that I claim the foregoing hereunto aflix my "signature.

BENGTF; FRrB Re. v 

